sound/pci/au88x0/au88x0_pcm.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify
   3  *  it under the terms of the GNU General Public License as published by
   4  *  the Free Software Foundation; either version 2 of the License, or
   5  *  (at your option) any later version.
   6  *
   7  *  This program is distributed in the hope that it will be useful,
   8  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *  GNU Library General Public License for more details.
  11  *
  12  *  You should have received a copy of the GNU General Public License
  13  *  along with this program; if not, write to the Free Software
  14  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  15  */
  16
  17 /*
  18  * Vortex PCM ALSA driver.
  19  *
  20  * Supports ADB and WT DMA. Unfortunately, WT channels do not run yet.
  21  * It remains stuck,and DMA transfers do not happen.
  22  */
  23 #include <sound/asoundef.h>
  24 #include <linux/time.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include "au88x0.h"
  29
  30 #define VORTEX_PCM_TYPE(x) (x->name[40])
  31
  32 /* hardware definition */
  33 static struct snd_pcm_hardware snd_vortex_playback_hw_adb = {
  34         .info =
  35             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  36              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  37              SNDRV_PCM_INFO_MMAP_VALID),
  38         .formats =
  39             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  40             SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
  41         .rates = SNDRV_PCM_RATE_CONTINUOUS,
  42         .rate_min = 5000,
  43         .rate_max = 48000,
  44         .channels_min = 1,
  45         .channels_max = 2,
  46         .buffer_bytes_max = 0x10000,
  47         .period_bytes_min = 0x20,
  48         .period_bytes_max = 0x1000,
  49         .periods_min = 2,
  50         .periods_max = 1024,
  51 };
  52
  53 #ifndef CHIP_AU8820
  54 static struct snd_pcm_hardware snd_vortex_playback_hw_a3d = {
  55         .info =
  56             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  57              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  58              SNDRV_PCM_INFO_MMAP_VALID),
  59         .formats =
  60             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  61             SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
  62         .rates = SNDRV_PCM_RATE_CONTINUOUS,
  63         .rate_min = 5000,
  64         .rate_max = 48000,
  65         .channels_min = 1,
  66         .channels_max = 1,
  67         .buffer_bytes_max = 0x10000,
  68         .period_bytes_min = 0x100,
  69         .period_bytes_max = 0x1000,
  70         .periods_min = 2,
  71         .periods_max = 64,
  72 };
  73 #endif
  74 static struct snd_pcm_hardware snd_vortex_playback_hw_spdif = {
  75         .info =
  76             (SNDRV_PCM_INFO_MMAP | /* SNDRV_PCM_INFO_RESUME | */
  77              SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_INTERLEAVED |
  78              SNDRV_PCM_INFO_MMAP_VALID),
  79         .formats =
  80             SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U8 |
  81             SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | SNDRV_PCM_FMTBIT_MU_LAW |
  82             SNDRV_PCM_FMTBIT_A_LAW,
  83         .rates =
  84             SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
  85         .rate_min = 32000,
  86         .rate_max = 48000,
  87         .channels_min = 1,
  88         .channels_max = 2,
  89         .buffer_bytes_max = 0x10000,
  90         .period_bytes_min = 0x100,
  91         .period_bytes_max = 0x1000,
  92         .periods_min = 2,
  93         .periods_max = 64,
  94 };
  95
  96 #ifndef CHIP_AU8810
  97 static struct snd_pcm_hardware snd_vortex_playback_hw_wt = {
  98         .info = (SNDRV_PCM_INFO_MMAP |
  99                  SNDRV_PCM_INFO_INTERLEAVED |
 100                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
 101         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 102         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS, // SNDRV_PCM_RATE_48000,
 103         .rate_min = 8000,
 104         .rate_max = 48000,
 105         .channels_min = 1,
 106         .channels_max = 2,
 107         .buffer_bytes_max = 0x10000,
 108         .period_bytes_min = 0x0400,
 109         .period_bytes_max = 0x1000,
 110         .periods_min = 2,
 111         .periods_max = 64,
 112 };
 113 #endif
 114 #ifdef CHIP_AU8830
 115 static unsigned int au8830_channels[3] = {
 116         1, 2, 4,
 117 };
 118
 119 static struct snd_pcm_hw_constraint_list hw_constraints_au8830_channels = {
 120         .count = ARRAY_SIZE(au8830_channels),
 121         .list = au8830_channels,
 122         .mask = 0,
 123 };
 124 #endif
 125 /* open callback */
 126 static int snd_vortex_pcm_open(struct snd_pcm_substream *substream)
 127 {
 128         vortex_t *vortex = snd_pcm_substream_chip(substream);
 129         struct snd_pcm_runtime *runtime = substream->runtime;
 130         int err;
 131
 132         /* Force equal size periods */
 133         if ((err =
 134              snd_pcm_hw_constraint_integer(runtime,
 135                                            SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 136                 return err;
 137         /* Avoid PAGE_SIZE boundary to fall inside of a period. */
 138         if ((err =
 139              snd_pcm_hw_constraint_pow2(runtime, 0,
 140                                         SNDRV_PCM_HW_PARAM_PERIOD_BYTES)) < 0)
 141                 return err;
 142
 143         snd_pcm_hw_constraint_step(runtime, 0,
 144                                         SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 64);
 145
 146         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 147 #ifndef CHIP_AU8820
 148                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_A3D) {
 149                         runtime->hw = snd_vortex_playback_hw_a3d;
 150                 }
 151 #endif
 152                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_SPDIF) {
 153                         runtime->hw = snd_vortex_playback_hw_spdif;
 154                         switch (vortex->spdif_sr) {
 155                         case 32000:
 156                                 runtime->hw.rates = SNDRV_PCM_RATE_32000;
 157                                 break;
 158                         case 44100:
 159                                 runtime->hw.rates = SNDRV_PCM_RATE_44100;
 160                                 break;
 161                         case 48000:
 162                                 runtime->hw.rates = SNDRV_PCM_RATE_48000;
 163                                 break;
 164                         }
 165                 }
 166                 if (VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB
 167                     || VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_I2S)
 168                         runtime->hw = snd_vortex_playback_hw_adb;
 169 #ifdef CHIP_AU8830
 170                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 171                         VORTEX_PCM_TYPE(substream->pcm) == VORTEX_PCM_ADB) {
 172                         runtime->hw.channels_max = 4;
 173                         snd_pcm_hw_constraint_list(runtime, 0,
 174                                 SNDRV_PCM_HW_PARAM_CHANNELS,
 175                                 &hw_constraints_au8830_channels);
 176                 }
 177 #endif
 178                 substream->runtime->private_data = NULL;
 179         }
 180 #ifndef CHIP_AU8810
 181         else {
 182                 runtime->hw = snd_vortex_playback_hw_wt;
 183                 substream->runtime->private_data = NULL;
 184         }
 185 #endif
 186         return 0;
 187 }
 188
 189 /* close callback */
 190 static int snd_vortex_pcm_close(struct snd_pcm_substream *substream)
 191 {
 192         //vortex_t *chip = snd_pcm_substream_chip(substream);
 193         stream_t *stream = (stream_t *) substream->runtime->private_data;
 194
 195         // the hardware-specific codes will be here
 196         if (stream != NULL) {
 197                 stream->substream = NULL;
 198                 stream->nr_ch = 0;
 199         }
 200         substream->runtime->private_data = NULL;
 201         return 0;
 202 }
 203
 204 /* hw_params callback */
 205 static int
 206 snd_vortex_pcm_hw_params(struct snd_pcm_substream *substream,
 207                          struct snd_pcm_hw_params *hw_params)
 208 {
 209         vortex_t *chip = snd_pcm_substream_chip(substream);
 210         stream_t *stream = (stream_t *) (substream->runtime->private_data);
 211         int err;
 212
 213         // Alloc buffer memory.
 214         err =
 215             snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 216         if (err < 0) {
 217                 printk(KERN_ERR "Vortex: pcm page alloc failed!\n");
 218                 return err;
 219         }
 220         /*
 221            printk(KERN_INFO "Vortex: periods %d, period_bytes %d, channels = %d\n", params_periods(hw_params),
 222            params_period_bytes(hw_params), params_channels(hw_params));
 223          */
 224         spin_lock_irq(&chip->lock);
 225         // Make audio routes and config buffer DMA.
 226         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 227                 int dma, type = VORTEX_PCM_TYPE(substream->pcm);
 228                 /* Dealloc any routes. */
 229                 if (stream != NULL)
 230                         vortex_adb_allocroute(chip, stream->dma,
 231                                               stream->nr_ch, stream->dir,
 232                                               stream->type);
 233                 /* Alloc routes. */
 234                 dma =
 235                     vortex_adb_allocroute(chip, -1,
 236                                           params_channels(hw_params),
 237                                           substream->stream, type);
 238                 if (dma < 0) {
 239                         spin_unlock_irq(&chip->lock);
 240                         return dma;
 241                 }
 242                 stream = substream->runtime->private_data = &chip->dma_adb[dma];
 243                 stream->substream = substream;
 244                 /* Setup Buffers. */
 245                 vortex_adbdma_setbuffers(chip, dma,
 246                                          params_period_bytes(hw_params),
 247                                          params_periods(hw_params));
 248         }
 249 #ifndef CHIP_AU8810
 250         else {
 251                 /* if (stream != NULL)
 252                    vortex_wt_allocroute(chip, substream->number, 0); */
 253                 vortex_wt_allocroute(chip, substream->number,
 254                                      params_channels(hw_params));
 255                 stream = substream->runtime->private_data =
 256                     &chip->dma_wt[substream->number];
 257                 stream->dma = substream->number;
 258                 stream->substream = substream;
 259                 vortex_wtdma_setbuffers(chip, substream->number,
 260                                         params_period_bytes(hw_params),
 261                                         params_periods(hw_params));
 262         }
 263 #endif
 264         spin_unlock_irq(&chip->lock);
 265         return 0;
 266 }
 267
 268 /* hw_free callback */
 269 static int snd_vortex_pcm_hw_free(struct snd_pcm_substream *substream)
 270 {
 271         vortex_t *chip = snd_pcm_substream_chip(substream);
 272         stream_t *stream = (stream_t *) (substream->runtime->private_data);
 273
 274         spin_lock_irq(&chip->lock);
 275         // Delete audio routes.
 276         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 277                 if (stream != NULL)
 278                         vortex_adb_allocroute(chip, stream->dma,
 279                                               stream->nr_ch, stream->dir,
 280                                               stream->type);
 281         }
 282 #ifndef CHIP_AU8810
 283         else {
 284                 if (stream != NULL)
 285                         vortex_wt_allocroute(chip, stream->dma, 0);
 286         }
 287 #endif
 288         substream->runtime->private_data = NULL;
 289         spin_unlock_irq(&chip->lock);
 290
 291         return snd_pcm_lib_free_pages(substream);
 292 }
 293
 294 /* prepare callback */
 295 static int snd_vortex_pcm_prepare(struct snd_pcm_substream *substream)
 296 {
 297         vortex_t *chip = snd_pcm_substream_chip(substream);
 298         struct snd_pcm_runtime *runtime = substream->runtime;
 299         stream_t *stream = (stream_t *) substream->runtime->private_data;
 300         int dma = stream->dma, fmt, dir;
 301
 302         // set up the hardware with the current configuration.
 303         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 304                 dir = 1;
 305         else
 306                 dir = 0;
 307         fmt = vortex_alsafmt_aspfmt(runtime->format);
 308         spin_lock_irq(&chip->lock);
 309         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 310                 vortex_adbdma_setmode(chip, dma, 1, dir, fmt, 0 /*? */ ,
 311                                       0);
 312                 vortex_adbdma_setstartbuffer(chip, dma, 0);
 313                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_SPDIF)
 314                         vortex_adb_setsrc(chip, dma, runtime->rate, dir);
 315         }
 316 #ifndef CHIP_AU8810
 317         else {
 318                 vortex_wtdma_setmode(chip, dma, 1, fmt, 0, 0);
 319                 // FIXME: Set rate (i guess using vortex_wt_writereg() somehow).
 320                 vortex_wtdma_setstartbuffer(chip, dma, 0);
 321         }
 322 #endif
 323         spin_unlock_irq(&chip->lock);
 324         return 0;
 325 }
 326
 327 /* trigger callback */
 328 static int snd_vortex_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 329 {
 330         vortex_t *chip = snd_pcm_substream_chip(substream);
 331         stream_t *stream = (stream_t *) substream->runtime->private_data;
 332         int dma = stream->dma;
 333
 334         spin_lock(&chip->lock);
 335         switch (cmd) {
 336         case SNDRV_PCM_TRIGGER_START:
 337                 // do something to start the PCM engine
 338                 //printk(KERN_INFO "vortex: start %d\n", dma);
 339                 stream->fifo_enabled = 1;
 340                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT) {
 341                         vortex_adbdma_resetup(chip, dma);
 342                         vortex_adbdma_startfifo(chip, dma);
 343                 }
 344 #ifndef CHIP_AU8810
 345                 else {
 346                         printk(KERN_INFO "vortex: wt start %d\n", dma);
 347                         vortex_wtdma_startfifo(chip, dma);
 348                 }
 349 #endif
 350                 break;
 351         case SNDRV_PCM_TRIGGER_STOP:
 352                 // do something to stop the PCM engine
 353                 //printk(KERN_INFO "vortex: stop %d\n", dma);
 354                 stream->fifo_enabled = 0;
 355                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 356                         vortex_adbdma_pausefifo(chip, dma);
 357                 //vortex_adbdma_stopfifo(chip, dma);
 358 #ifndef CHIP_AU8810
 359                 else {
 360                         printk(KERN_INFO "vortex: wt stop %d\n", dma);
 361                         vortex_wtdma_stopfifo(chip, dma);
 362                 }
 363 #endif
 364                 break;
 365         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 366                 //printk(KERN_INFO "vortex: pause %d\n", dma);
 367                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 368                         vortex_adbdma_pausefifo(chip, dma);
 369 #ifndef CHIP_AU8810
 370                 else
 371                         vortex_wtdma_pausefifo(chip, dma);
 372 #endif
 373                 break;
 374         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 375                 //printk(KERN_INFO "vortex: resume %d\n", dma);
 376                 if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 377                         vortex_adbdma_resumefifo(chip, dma);
 378 #ifndef CHIP_AU8810
 379                 else
 380                         vortex_wtdma_resumefifo(chip, dma);
 381 #endif
 382                 break;
 383         default:
 384                 spin_unlock(&chip->lock);
 385                 return -EINVAL;
 386         }
 387         spin_unlock(&chip->lock);
 388         return 0;
 389 }
 390
 391 /* pointer callback */
 392 static snd_pcm_uframes_t snd_vortex_pcm_pointer(struct snd_pcm_substream *substream)
 393 {
 394         vortex_t *chip = snd_pcm_substream_chip(substream);
 395         stream_t *stream = (stream_t *) substream->runtime->private_data;
 396         int dma = stream->dma;
 397         snd_pcm_uframes_t current_ptr = 0;
 398
 399         spin_lock(&chip->lock);
 400         if (VORTEX_PCM_TYPE(substream->pcm) != VORTEX_PCM_WT)
 401                 current_ptr = vortex_adbdma_getlinearpos(chip, dma);
 402 #ifndef CHIP_AU8810
 403         else
 404                 current_ptr = vortex_wtdma_getlinearpos(chip, dma);
 405 #endif
 406         //printk(KERN_INFO "vortex: pointer = 0x%x\n", current_ptr);
 407         spin_unlock(&chip->lock);
 408         return (bytes_to_frames(substream->runtime, current_ptr));
 409 }
 410
 411 /* operators */
 412 static struct snd_pcm_ops snd_vortex_playback_ops = {
 413         .open = snd_vortex_pcm_open,
 414         .close = snd_vortex_pcm_close,
 415         .ioctl = snd_pcm_lib_ioctl,
 416         .hw_params = snd_vortex_pcm_hw_params,
 417         .hw_free = snd_vortex_pcm_hw_free,
 418         .prepare = snd_vortex_pcm_prepare,
 419         .trigger = snd_vortex_pcm_trigger,
 420         .pointer = snd_vortex_pcm_pointer,
 421         .page = snd_pcm_sgbuf_ops_page,
 422 };
 423
 424 /*
 425 *  definitions of capture are omitted here...
 426 */
 427
 428 static char *vortex_pcm_prettyname[VORTEX_PCM_LAST] = {
 429         CARD_NAME " ADB",
 430         CARD_NAME " SPDIF",
 431         CARD_NAME " A3D",
 432         CARD_NAME " WT",
 433         CARD_NAME " I2S",
 434 };
 435 static char *vortex_pcm_name[VORTEX_PCM_LAST] = {
 436         "adb",
 437         "spdif",
 438         "a3d",
 439         "wt",
 440         "i2s",
 441 };
 442
 443 /* SPDIF kcontrol */
 444
 445 static int snd_vortex_spdif_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 446 {
 447         uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
 448         uinfo->count = 1;
 449         return 0;
 450 }
 451
 452 static int snd_vortex_spdif_mask_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 453 {
 454         ucontrol->value.iec958.status[0] = 0xff;
 455         ucontrol->value.iec958.status[1] = 0xff;
 456         ucontrol->value.iec958.status[2] = 0xff;
 457         ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS;
 458         return 0;
 459 }
 460
 461 static int snd_vortex_spdif_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 462 {
 463         vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 464         ucontrol->value.iec958.status[0] = 0x00;
 465         ucontrol->value.iec958.status[1] = IEC958_AES1_CON_ORIGINAL|IEC958_AES1_CON_DIGDIGCONV_ID;
 466         ucontrol->value.iec958.status[2] = 0x00;
 467         switch (vortex->spdif_sr) {
 468         case 32000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_32000; break;
 469         case 44100: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_44100; break;
 470         case 48000: ucontrol->value.iec958.status[3] = IEC958_AES3_CON_FS_48000; break;
 471         }
 472         return 0;
 473 }
 474
 475 static int snd_vortex_spdif_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 476 {
 477         vortex_t *vortex = snd_kcontrol_chip(kcontrol);
 478         int spdif_sr = 48000;
 479         switch (ucontrol->value.iec958.status[3] & IEC958_AES3_CON_FS) {
 480         case IEC958_AES3_CON_FS_32000: spdif_sr = 32000; break;
 481         case IEC958_AES3_CON_FS_44100: spdif_sr = 44100; break;
 482         case IEC958_AES3_CON_FS_48000: spdif_sr = 48000; break;
 483         }
 484         if (spdif_sr == vortex->spdif_sr)
 485                 return 0;
 486         vortex->spdif_sr = spdif_sr;
 487         vortex_spdif_init(vortex, vortex->spdif_sr, 1);
 488         return 1;
 489 }
 490
 491 /* spdif controls */
 492 static struct snd_kcontrol_new snd_vortex_mixer_spdif[] __devinitdata = {
 493         {
 494                 .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 495                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
 496                 .info =         snd_vortex_spdif_info,
 497                 .get =          snd_vortex_spdif_get,
 498                 .put =          snd_vortex_spdif_put,
 499         },
 500         {
 501                 .access =       SNDRV_CTL_ELEM_ACCESS_READ,
 502                 .iface =        SNDRV_CTL_ELEM_IFACE_PCM,
 503                 .name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,CON_MASK),
 504                 .info =         snd_vortex_spdif_info,
 505                 .get =          snd_vortex_spdif_mask_get
 506         },
 507 };
 508
 509 /* create a pcm device */
 510 static int __devinit snd_vortex_new_pcm(vortex_t *chip, int idx, int nr)
 511 {
 512         struct snd_pcm *pcm;
 513         struct snd_kcontrol *kctl;
 514         int i;
 515         int err, nr_capt;
 516
 517         if (!chip || idx < 0 || idx >= VORTEX_PCM_LAST)
 518                 return -ENODEV;
 519
 520         /* idx indicates which kind of PCM device. ADB, SPDIF, I2S and A3D share the
 521          * same dma engine. WT uses it own separate dma engine which can't capture. */
 522         if (idx == VORTEX_PCM_ADB)
 523                 nr_capt = nr;
 524         else
 525                 nr_capt = 0;
 526         err = snd_pcm_new(chip->card, vortex_pcm_prettyname[idx], idx, nr,
 527                           nr_capt, &pcm);
 528         if (err < 0)
 529                 return err;
 530         snprintf(pcm->name, sizeof(pcm->name),
 531                 "%s %s", CARD_NAME_SHORT, vortex_pcm_name[idx]);
 532         chip->pcm[idx] = pcm;
 533         // This is an evil hack, but it saves a lot of duplicated code.
 534         VORTEX_PCM_TYPE(pcm) = idx;
 535         pcm->private_data = chip;
 536         /* set operators */
 537         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 538                         &snd_vortex_playback_ops);
 539         if (idx == VORTEX_PCM_ADB)
 540                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 541                                 &snd_vortex_playback_ops);
 542
 543         /* pre-allocation of Scatter-Gather buffers */
 544
 545         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 546                                               snd_dma_pci_data(chip->pci_dev),
 547                                               0x10000, 0x10000);
 548
 549         if (VORTEX_PCM_TYPE(pcm) == VORTEX_PCM_SPDIF) {
 550                 for (i = 0; i < ARRAY_SIZE(snd_vortex_mixer_spdif); i++) {
 551                         kctl = snd_ctl_new1(&snd_vortex_mixer_spdif[i], chip);
 552                         if (!kctl)
 553                                 return -ENOMEM;
 554                         if ((err = snd_ctl_add(chip->card, kctl)) < 0)
 555                                 return err;
 556                 }
 557         }
 558         return 0;
 559 }